Stop storing data in the repo

[MartinKolarik]

We're now at 75 GB of used LFS storage because of storing every revision of packages.json in the repo, and that number will only go up, requiring more and more data packs to keep working. The primary way of consuming the data is npm, where the file is pushed after each update, so I think we should stop committing the data in the repo (and delete all previous revisions), and only keep the scripts here.